The complex relationship between smoking in pregnancy and very preterm delivery. Results of the Epipage study.
D000367:Age Factors; D016022:Case-Control Studies; D005260:Female; D005602:France / Q000453:epidemiology; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D017533:Marital Status; D007752:Obstetric Labor, Premature / Q000453:epidemiology / Q000209:etiology*; D016017:Odds Ratio; D010298:Parity; D011247:Pregnancy; D011256:Pregnancy Outcome; D012044:Regression Analysis; D012307:Risk Factors; D012907:Smoking / Q000009:adverse effects* / Q000453:epidemiology